1 files changed, 262 insertions, 0 deletions
diff --git a/sal/osl/unx/file_path_helper.cxx b/sal/osl/unx/file_path_helper.cxx
new file mode 100644
index 000000000..a8ee5238f
--- /dev/null
+++ b/sal/osl/unx/file_path_helper.cxx
@@ -0,0 +1,262 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <cassert>
+#include <utility>
+
+#include "file_path_helper.hxx"
+#include "uunxapi.hxx"
+
+#include <osl/diagnose.h>
+#include <rtl/ustring.hxx>
+#include <sal/log.hxx>
+
+const sal_Unicode FPH_CHAR_PATH_SEPARATOR = '/';
+const sal_Unicode FPH_CHAR_DOT            = '.';
+const sal_Unicode FPH_CHAR_COLON          = ':';
+
+void osl_systemPathRemoveSeparator(rtl_String* pstrPath)
+{
+    OSL_PRECOND(nullptr != pstrPath, "osl_systemPathRemoveSeparator: Invalid parameter");
+    if (pstrPath == nullptr)
+        return;
+
+    // maybe there are more than one separator at end
+    // so we run in a loop
+    while ((pstrPath->length > 1) && (pstrPath->buffer[pstrPath->length - 1] == FPH_CHAR_PATH_SEPARATOR))
+    {
+        pstrPath->length--;
+        pstrPath->buffer[pstrPath->length] = '\0';
+    }
+
+    SAL_WARN_IF( !((0 == pstrPath->length) || (1 == pstrPath->length) ||
+                 (pstrPath->length > 1 && pstrPath->buffer[pstrPath->length - 1] != FPH_CHAR_PATH_SEPARATOR)),
+                 "sal.osl",
+                 "osl_systemPathRemoveSeparator: Post condition failed");
+}
+
+namespace {
+
+template<typename T> void systemPathEnsureSeparator(T* ppstrPath)
+{
+    assert(nullptr != ppstrPath);
+    sal_Int32    lp = ppstrPath->getLength();
+    sal_Int32    i  = ppstrPath->lastIndexOf(FPH_CHAR_PATH_SEPARATOR);
+
+    if ((lp > 1 && i != (lp - 1)) || ((lp < 2) && i < 0))
+    {
+        *ppstrPath += "/";
+    }
+
+    SAL_WARN_IF( !ppstrPath->endsWith("/"),
+                 "sal.osl",
+                 "systemPathEnsureSeparator: Post condition failed");
+}
+
+}
+
+bool osl_systemPathIsRelativePath(const rtl_uString* pustrPath)
+{
+    OSL_PRECOND(nullptr != pustrPath, "osl_systemPathIsRelativePath: Invalid parameter");
+    return ((pustrPath == nullptr) || (pustrPath->length == 0) || (pustrPath->buffer[0] != FPH_CHAR_PATH_SEPARATOR));
+}
+
+namespace {
+
+template<typename T> T systemPathMakeAbsolutePath_(
+    const T& BasePath,
+    const T& RelPath)
+{
+    T base(BasePath);
+
+    if (!base.isEmpty())
+        systemPathEnsureSeparator(&base);
+
+    return base + RelPath;
+}
+
+}
+
+OString osl::systemPathMakeAbsolutePath(
+    const OString& BasePath,
+    const OString& RelPath)
+{
+    return systemPathMakeAbsolutePath_(BasePath, RelPath);
+}
+
+OUString osl::systemPathMakeAbsolutePath(
+    const OUString& BasePath,
+    const OUString& RelPath)
+{
+    return systemPathMakeAbsolutePath_(BasePath, RelPath);
+}
+
+void osl_systemPathGetFileNameOrLastDirectoryPart(
+    const rtl_String*     pstrPath,
+    rtl_String**       ppstrFileNameOrLastDirPart)
+{
+    OSL_PRECOND(pstrPath && ppstrFileNameOrLastDirPart,
+                "osl_systemPathGetFileNameOrLastDirectoryPart: Invalid parameter");
+
+    OString path(const_cast<rtl_String*>(pstrPath));
+
+    osl_systemPathRemoveSeparator(path.pData);
+
+    OString last_part;
+
+    if (path.getLength() > 1 || (path.getLength() == 1 && path[0] != FPH_CHAR_PATH_SEPARATOR))
+    {
+        sal_Int32 idx_ps = path.lastIndexOf(FPH_CHAR_PATH_SEPARATOR);
+        idx_ps++; // always right to increment by one even if idx_ps == -1!
+        last_part = path.copy(idx_ps);
+    }
+    rtl_string_assign(ppstrFileNameOrLastDirPart, last_part.pData);
+}
+
+bool osl_systemPathIsHiddenFileOrDirectoryEntry(
+    const rtl_String* pstrPath)
+{
+    OSL_PRECOND(nullptr != pstrPath, "osl_systemPathIsHiddenFileOrDirectoryEntry: Invalid parameter");
+    if ((pstrPath == nullptr) || (pstrPath->length == 0))
+        return false;
+
+    OString fdp;
+    osl_systemPathGetFileNameOrLastDirectoryPart(pstrPath, &fdp.pData);
+
+    return ((fdp.pData->length > 0) &&
+            (fdp.pData->buffer[0] == FPH_CHAR_DOT) &&
+            !osl_systemPathIsLocalOrParentDirectoryEntry(fdp.pData));
+}
+
+bool osl_systemPathIsLocalOrParentDirectoryEntry(
+    const rtl_String* pstrPath)
+{
+    OSL_PRECOND(pstrPath, "osl_systemPathIsLocalOrParentDirectoryEntry: Invalid parameter");
+
+    OString dirent;
+
+    osl_systemPathGetFileNameOrLastDirectoryPart(pstrPath, &dirent.pData);
+
+    return (dirent == "." ||
+            dirent == "..");
+}
+
+namespace {
+
+/** Simple iterator for a path list separated by the specified character
+*/
+class path_list_iterator
+{
+public:
+
+    /* after construction get_current_item
+       returns the first path in list, no need
+       to call reset first
+     */
+    path_list_iterator(OUString path_list, sal_Unicode list_separator = FPH_CHAR_COLON) :
+        m_path_list(std::move(path_list)),
+        m_end(m_path_list.getStr() + m_path_list.getLength() + 1),
+        m_separator(list_separator)
+    {
+        reset();
+    }
+
+    path_list_iterator(const path_list_iterator&) = delete;
+    path_list_iterator& operator=(const path_list_iterator&) = delete;
+
+    void reset()
+    {
+        m_path_segment_begin = m_path_segment_end = m_path_list.getStr();
+        advance();
+    }
+
+    void next()
+    {
+        OSL_PRECOND(!done(), "path_list_iterator: Already done!");
+
+        m_path_segment_begin = ++m_path_segment_end;
+        advance();
+    }
+
+    bool done() const
+    {
+        return (m_path_segment_end >= m_end);
+    }
+
+    OUString get_current_item() const
+    {
+        return OUString(
+            m_path_segment_begin,
+            (m_path_segment_end - m_path_segment_begin));
+    }
+
+private:
+    /* move m_path_end to the next separator or
+       to the end of the string
+     */
+    void advance()
+    {
+        while (!done() && *m_path_segment_end && (*m_path_segment_end != m_separator))
+            ++m_path_segment_end;
+
+        OSL_ASSERT(m_path_segment_end <= m_end);
+    }
+
+private:
+    OUString            m_path_list;
+    const sal_Unicode*  m_end;
+    const sal_Unicode   m_separator;
+    const sal_Unicode*  m_path_segment_begin;
+    const sal_Unicode*  m_path_segment_end;
+};
+
+}
+
+bool osl_searchPath(
+    const rtl_uString* pustrFilePath,
+    const rtl_uString* pustrSearchPathList,
+    rtl_uString**      ppustrPathFound)
+{
+    OSL_PRECOND(pustrFilePath && pustrSearchPathList && ppustrPathFound, "osl_searchPath: Invalid parameter");
+
+    bool               bfound = false;
+    OUString      fp(const_cast<rtl_uString*>(pustrFilePath));
+    OUString      pl(const_cast<rtl_uString*>(pustrSearchPathList));
+    path_list_iterator pli(pl);
+
+    while (!pli.done())
+    {
+        OUString p = pli.get_current_item();
+        systemPathEnsureSeparator(&p);
+        p += fp;
+
+        if (osl::access(osl::OUStringToOString(p), F_OK) > -1)
+        {
+            bfound = true;
+            rtl_uString_assign(ppustrPathFound, p.pData);
+            break;
+        }
+        pli.next();
+    }
+    return bfound;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */